'A language is regular if and only if it is accepted by a finite automation'.
'A language is regular if and only if it is accepted by a finite automation'
If a language can be represented by a regular expression, it is accepted by a non deterministic finite automaton.
Regular language in finite automata:-
A regular language satisfies the following equivalent properties: it is the language of a regular expression (by the above definition) it is the language accepted by a nondeterministic finite automaton (NFA) it is the language accepted by a deterministic finite automaton (DFA) it can be generated by a regular grammar.
A regular language is a formal language that can be expressed using a regular expression, in the strict sense of the latter notion used in theoretical computer science.